Photons Energy Level

  • Thread starter Air
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  • #1
Air
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I understand that electrons are excited to higher energy levels. When they fall back levels, photons are emitted.

If green light has wavelength [itex]5.58 \times 10^{-7}m[/itex] and red light has wavelength of [itex]6.48 \times 10^{-7}m[/itex], why is it that when a photon is emitted from green light, it falls a greater energy level?
 

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  • #2
Mapes
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What is the relationship between energy and wavelength for electromagnetic waves?
 
  • #3
Air
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[itex]v = f \lambda [/itex]
[itex]E = hf = \frac{hv}{\lambda}[/itex]

So green light has a smaller wavelength hence a larger value of energy. Is this why it falls a greater energy level?
 
  • #4
Defennder
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Yes, that is so.
 
  • #5
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[itex]v = f \lambda [/itex]
[itex]E = hf = \frac{hv}{\lambda}[/itex]

So green light has a smaller wavelength hence a larger value of energy. Is this why it falls a greater energy level?
so... if E=hf, green light have more energy than red light?
 
  • #6
Defennder
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Yes, but that energy is per photon.
 

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